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Active radiometer for self-calibrated furnace temperature measurements

United States Patent

5,573,339
November 12, 1996
View the Complete Patent at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
Radiometer with a probe beam superimposed on its field-of-view for furnace temperature measurements. The radiometer includes a heterodyne millimeter/submillimeter-wave receiver including a millimeter/submillimeter-wave source for probing. The receiver is adapted to receive radiation from a surface whose temperature is to be measured. The radiation includes a surface emission portion and a surface reflection portion which includes the probe beam energy reflected from the surface. The surface emission portion is related to the surface temperature and the surface reflection portion is related to the emissivity of the surface. The simultaneous measurement of surface emissivity serves as a real time calibration of the temperature measurement.
Woskov; Paul P. (Bedford, MA), Cohn; Daniel R. (Chestnut Hill, MA), Titus; Charles H. (Newtown Square, PA), Wittle; J. Kenneth (Chester Springs, PA), Surma; Jeffrey E. (Kennewick, WA)
Electro-Pyrolysis, Inc. (Wayne, PA), Massachusetts Institute of Technology (Cambridge, MA), Battelle Memorial Institute (Richmond, WA)
08/ 181,706
January 14, 1994
This invention was made with government support under Contract Number DE-AC0676RLO 1830 awarded by the Department of Energy. The government has certain rights in the invention.